Shape Formula Picture Parallelogram Triangle Trapezoid Kite Rectangle

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Presentation transcript:

Shape Formula Picture Parallelogram Triangle Trapezoid Kite Rectangle Regular Polygon

Area & Perimeter Area: the two-dimensional size of a figure Perimeter: The distance around the edge of figure.

Formulas

Parallelogram

Let’s Practice… 1. 2.

Let’s Practice… If the area is 60 in2 , and the base is 6 in, what is the length of the height?

Triangle

Let’s Practice…

Let’s Practice… If the area is 32.5 in2, what is the length of the base?

Trapezoid

Let’s Practice…

Let’s Practice… If the area of the trapezoid is 21.25, what is the length of the second base?

Kite MEMORIZE THIS!!!! This formula is not on the reference sheet.

Let’s Practice…

Irregular Figures How would you find the area of this figure?

Area of Irregular Figures 2 different ways… 1st Method: 1. Break the irregular shape up into known figures. 2. Find the area of each known figure. 3. Add all areas together to find the area of the irregular figure.

Area of Irregular Figures 2nd Method: Fill in the missing space. Find the area of the large, filled in figure. Then, find the area of smaller shape. Subtract. Area of large – Area of small = Area of composite figure

Let’s Practice…